Ultra-violet lamp.



*light produced" by the usual ultra-violet ,decreases as the lamps get heated, and the plates clamped compactly together adjacent UNITED su ge.

PATENT OFFICE.

ULTRA-VIOLET LAMP.

Specification of Letters Patent.

Patented April 17, 1906.

Application filed il'une 12, 1905. Serial No. 264,875.

To all whom it may concern:

Be it known that I, THOMAS B. KINRAIDE, a citizen of the United States, residing at J amaica Plain, in the county of Suffolk and State of Massachusetts, have invented an Improvement .in Ultra-Violet Lamps, of which the following description, in connection with the accompanyin drawings, 'is a specification, like figures on the drawings representing like parts.

The object of my invention'is to produce a simple and inexpensive lamp for ultra vicletray work capable of comparatively continuous use.

I have found that in use the quality of the lamps (operated by a condenser-discharge) ultra-violet rays quickly cease on ovcrheating of the lamps, so that it is practically impossible to maintain the ultra-violet ray continuously for effective work for any comparatively long period; yet it is desirable, if not necessary, in many instances that the production of this ray shall be not only continuous, but substantially uniform and reliable. Accordingly I have devised the hereinafterdescribed mechanism for accomplishing-the desired object as above explained.

Referring to the drawings, in which I have shown a preferred embodiment of my inven-. tion, Fi ure 1 represents the essentials thereof in side elevation, and Fig. 2 is a top plan view thereof.

In carrying out my invention I have eliminated all needless appurtenances and have secured my object by providing the required electrodes (preferably iron) capable of automatically maintaining themselves-within the range of maximum heating, thereby producing the continuous and uniform ultraviolet condition desired.

Mounted on a suitable base 1 are opposite standards 2 3, supporting the opposite elec-' trodes 4 5, the former in fixed position and the latter in adjustable osition. Each elec-' trode is composed of a arge number of thin one end by suitable i11ear \s,as by a bolt 6, which in the adjustable electrode is shown as simply provided with a tightening-nut 7 and in the fixed electrode is shown as provided also with a binding-nut 8 for holding in place a terminal wire 9. The central plates 10 are composed of material suitable for producing to the best advantage the desired results,

such as iron or steel, and at the opposite sides thereof are similar thin plates 12 of like material or of copper, aluminium, or any heatdissipating substance, said plates converging as close to the discharge-points of the electrodes as feasible without interfering with the proper working thereof and at their opposite ends extending rearwardly from the arcingpoint to a considerable distance and separated from each other by fan-like format-ion,

as clearly shown at 13, thereby forming be- 4 ciency continuously without exceeding said temperature. The tightly-compressed thin plates readily transmit from one to another the heat from the central discharge-electrodes 10 and divide said heat among the individual plates 1'2, conveying it l'i' )idly rearwardly and dissipating it uniformiy into the surrounding air, thereby constantly drawin away from the electrodes the heat h-icl i would otherwise quickly render them inoperative for producing ultra-violet rays.

The adjustable electrode is supported on a yielding spring-bar 14,fast in the upper end of the post 3 and provided witha binding-nut 15 for securing a circuit terminal 16. Thespring 14 is under constant tendency to swing its electrodr rearwardly. Said electrode is provided with a rigid arm 17, adjustable by means of an eccentric 18 on a post 19, operated by a handle 20, so that as the eccentric is swung forward the electrode 5 is correspondingly adjusted toward the opposite electrode 4, or as the eccentric is swung back the electrode 5 is correspondingly removed from the fixed electrode 4.

I prefer the form of the electrode as shown adjacent the discharge-area, as it c onduces to the best results, the massing of the metal at this pointnot only taking care of the heat, but being especially efficient with rcierence to the current.

My mechanism also-allords convenient and inexpensive means .for renewing theelectrodes, as it becomes necessary merely to remove the thin plates or strips 10 or part of them only, as they become burned or corroded, and so likewise with any of the heatdissipating plates or vanes 12-.

' It will be understood that I am not limited to the constructional details herein set forth except as otherwise expressed in the claims, inasmuch as my invention is capable of a wide variety of embodiments without departing irom the spirit and scope thereof.

Having described my invention, what I elaim as new, and desire to secure by Letters Patent, is

1. An ultra-violet lamp, comprising opposite electrodes, having central dischargepoints, and provided withrearwardly-extending separated heat-dissipating members for condnctin the heat rearwardly from said points an maintaining an even temperature of the discharge-points in operation.

An ultra-violet lamp, comprising opposite electrodes, having central discharge,- points and heat-absorbing masses surrounding said discharge-points and provided with marginally-extending, separated, hGSJi'FdISSP t rig members.

An ultra-violet lamp, comprisin opposite electrodes, consisting of a mass 0 metal the discharge areaand separated at the thereof into a multitude of diverging plates for dissipating the heat fromsaid mass.

-tWo subscribing witnesses.

4. In an ultra-violet lamp, an electrode consisting of a plurality" of" metal plates clamped together in mutual contact at the dischar e end thereof and spread apart from each ot er at the opposite end of said-electrode.

5. In an ultra-violet lamp, an electrode having a Wedge-shaped dischar e end anda fan-shaped rear end, compose of a large number of thin metal plates, means clamping said plates tightl togetherat the said discharge end, said p ates beingbent apart from each other to form intervening air-spaces at said rear end. a 1

6. In an ultra-violet lamp, an electrode, consisting of a plurality of thin plates clamped tightly together at oneend and separated from each other at the rear thereof, the inner lates thereof consistin of conductors efrective for producing u tra violet rays and extending forward to constitute discharge-' points, and the remaining plates consisting of conductors eilectivelor radiating heat.

In testimony whereof I have signed my name to this specification in. the presence of THOMAS B. KINRAIDE.

Witnesses: I

GEO. H. MAXWELL, M. A. JONES. 

